Frost Dates for Evergreen, MT

Based on data from Kalispell Glacier AP weather station, 5 miles away

Frost Dates

Last Spring Frost (50%) iA 50% chance that the last spring frost has already passed by this date. Most gardeners use this as their primary planting guide. May 31
First Fall Frost (50%) iA 50% chance that the first fall frost has occurred by this date. Plan to harvest or protect tender plants before this date. September 10
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

30% Probability iOnly a 30% chance of frost remaining by this date. Use these dates for a safer planting window, especially for tender plants sensitive to cold.

Last Spring Frost June 7
First Fall Frost September 4

Hard Freeze (28°F)

Last Spring Hard Freeze May 10
First Fall Hard Freeze September 27
48.23°N, -114.28°W © OpenStreetMap

Growing Season

102 Days May 31 to September 10

USDA Hardiness Zone iHardiness zones indicate which perennial plants can survive winter in your area. For annual vegetables, frost dates and growing season length matter more than hardiness zone.

Zone 5a

Avg. annual minimum: −20 to −15°F (−29 to −26°C)

Learn more

Köppen Climate iThe Köppen climate classification system categorizes climates based on temperature and precipitation patterns.

Dfb Warm-Summer Continental

Warm summers and cold, snowy winters. A shorter growing season than hot-summer continental. Hardy vegetables, root crops, and cool-season greens do well. Season extension is valuable.

Köppen climate map

Temperature

10° 30° 50° 70° 90°
24°
High: 31°F
Avg: 24°F
Low: 16°F
Jan
27°
High: 36°F
Avg: 27°F
Low: 18°F
Feb
35°
High: 45°F
Avg: 35°F
Low: 24°F
Mar
43°
High: 55°F
Avg: 43°F
Low: 31°F
Apr
52°
High: 65°F
Avg: 52°F
Low: 38°F
May
58°
High: 71°F
Avg: 58°F
Low: 44°F
Jun
65°
High: 82°F
Avg: 65°F
Low: 48°F
Jul
64°
High: 82°F
Avg: 64°F
Low: 46°F
Aug
54°
High: 70°F
Avg: 54°F
Low: 38°F
Sep
42°
High: 54°F
Avg: 42°F
Low: 29°F
Oct
31°
High: 39°F
Avg: 31°F
Low: 24°F
Nov
24°
High: 31°F
Avg: 24°F
Low: 17°F
Dec
32°F
28°F
Avg High Avg Temp Avg Low Light Frost (32°F) Hard Frost (28°F)

Precipitation

0" 1" 2" 3" 3.7"
1.8"
1.82"
Jan
1.4"
1.40"
Feb
1.7"
1.67"
Mar
1.8"
1.83"
Apr
2.7"
2.70"
May
3.7"
3.69"
Jun
2.7"
2.74"
Jul
1.9"
1.94"
Aug
2.3"
2.33"
Sep
2.5"
2.48"
Oct
1.9"
1.95"
Nov
1.9"
1.86"
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec8.5h10h11.5h13.5h15h16h15.5h14h12.5h10.5h9h8h
Jan: 7:44 AM – 4:16 PM · 8h 33m
Feb: 7:01 AM – 4:59 PM · 9h 57m
Mar: 6:13 AM – 5:47 PM · 11h 35m
Apr: 5:17 AM – 6:43 PM · 13h 26m
May: 4:30 AM – 7:30 PM · 14h 60m
Jun: 4:04 AM – 7:56 PM · 15h 51m
Jul: 4:15 AM – 7:45 PM · 15h 30m
Aug: 4:56 AM – 7:04 PM · 14h 08m
Sep: 5:50 AM – 6:10 PM · 12h 20m
Oct: 6:44 AM – 5:16 PM · 10h 32m
Nov: 7:32 AM – 4:28 PM · 8h 56m
Dec: 7:56 AM – 4:04 PM · 8h 08m
Daylight Longest: 15h 53m · Shortest: 8h 07m

Nearby Stations

Whitefish, MT May 16 - September 25 Creston, MTMay 12 - September 25 Hungry Horse Dam, MT May 9 - October 1 W Glacier, MT May 18 - September 20 Olney, MT Bigfork 13 S, MT May 1 - October 15

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